[Testicular metastasis of a metachronous small cell neuroendocrinic prostate cancer after anti-hormonal therapy of a prostatic adenocarcinoma. Case report and literature review].

Secondary malignant testicular tumors are rare, with the exception of infiltrations by lymphomas and leukemias. Metastases are sometimes found in cancers of the lung, gastrointestinal tract, kidney, skin and prostate. Less than about 200 cases of testicular metastasis of prostate cancer have been described in the literature. This is this a very small number in comparison to the high incidence of prostate cancer and the vast number of orchiectomies for operative hormone deprivation in advanced cases. The testicle metastases described are mostly unilateral and are often found as ductal carcinoma of the prostate. In our case, the testicular metastasis from a small cell prostate carcinoma appeared 2.5 years after androgen deprivation of an adenocarcinoma of the prostate.